Aircraft type Screw clamps on the upper and lower radiator hoses are correct for 69 and newer.
The correct ones read: SURE TITE 28 -
The heater hoses did use tower clamps.
If you want those correct the 3/4 is a DMC tower clamp which is yellow zinc dichromate and the 5/8 are std zinc Whittaker tower clamp.
Also if looking for a correct appearance you can use some alcohol or goof off and remove the GM stencils from the heater hoses - there was a letter code every so many feet but no GM logo.
238 distributors with all the correct parts come up from time to time.
I have recently seen some 536 advance poles /starwheels
A NOS LT1 536 on ebay for $375
and one manufactured by EC for under $200
The difficult item will be the 272 coil. They fetch $350-500.
Try this link to the album of LT1 photos.
https://photos.app.goo.gl/wMRDJgmyDyAwc9Nh8
__________________
~JAG~
NCRS#65120
68 GTO HO 4 spd Alpine Blue /Parchment 2 owner car
#21783 71 Corvette LT1 45k miles Orig paint - Brandshatch Green - National Top Flight - last known 71 LT1 built.
71 Corvette LT1 42k miles Original paint - Black - black leather - only black LT1 known to exist.
NUMEROUS Lemans blue Camaros,
Monza Red and Daytona Yellow Corvettes
& a Chevelle or two...
Survivors, restored cars, & other photos
https://picasaweb.google.com/lh/myphotos